Control for high velocity high pressure water delivery system



Feb. 25, 1958 E. FQWRIGHT ETAL CONTROL FoR HIGH VELOCITY HIGH PRESSURE WATER DELIVERY SYSTEM Filed July 22, 1955 .lion- United StatesA Patefic@ CONTROL FOR' HIGH VELOCITY HIGHE PRES- SURE WATER DELIVERY SYSTEM Elliott F. Wright, Plainfield, and August' J. Keuilel, Summit, N. J., assignors to Worthington Corporation, Harrison, N. J., a'corporationvof Delaware Application July 22, 1955, Serial No. 523,643v

3 Claims. (Cl. 1035-12) This invention relates generally' to means for controlling the operation of a high pressure water delivery' sysf i.E Furtherv objects` and advantages of' the invention will become. evident from` the following description with refference to the accompanying drawing in which the single gure'shows a diagrammatic sketch of a control system for' a high pressure, high. velocity uid'v delivery system. Referring to the drawingA in which the' control system is shown operatively' connected" to the h'igh pressure tluid delivery system being utilized for removing coke from a coiing chamber shown at` 1, the coke will be drilled' and cut by hydraulic tools Z'rnounted on the-end of a hollow driil stem e1ement'3 toV bev moved upwardly and downwardlyv in the coke bed inthe cokiug chamber 'I by any suitable meansl (not shown);

High VpressureV water is fed' tothe drill` stem element 3 from* the main; delivery line 4 to which itY is connected. The main delivery line 4' is in communication with the 'discharge of avpump or pumps 5- in turn having its suction communicating withthe water reservoir 6 through `the suctionipipe T.' The main delivery line 4 is provided with a normally' closed mainV delivery line control valve '8i operatedthrough a diaphragmI type motorl 9 in turn from a coking chamber', hydraulic apparatus is utilized 'g which delivers. high pressure water to drilling and4 cutting heads which first drillv acenter hole, downwardly through the coke in the coke chamber and then by means of. lateral jets, cut the coke in layers to facilitate the removal of the coke into a suitable conveying means for removing it from ythe area where the coke chamber is located.

In the drilling and cutting operation, the pump s'run at full speed to get maximum rated pressure at the tools. However, there are at least two important factors in actuated by pneumatic pressure; asi-hereinafter described. A by-pass pipe 10 connected between themain delivery line 4 and the reservoir 6'an'd provided with a normally iopen: by-passz-con-trol, valve. 1.1 will: by-passY water from the discharge. side: cime-pump 5 to the reservoir atall times: unless-.the valve 1.1is actuatedl to-aA closed position as ishereafter described. in. the operation! of the present .control system...

The pump 5. may be anysuitable type;v of high pressure i iluid delivery pump-of which there. are many now availoperating these systems which must be taken into account.

minimizing hydraulic shock. Second, its highly desirable to so operate the system that the plant steam will be utilized to thc greatest advantage with the leastl power loss.

The present' invention accomplishes these desirable resupply: lme 18 which.4 receives arr under pressure from sults by providing a control system to cause the 'turbine and pump:

(a) to idle at a speed suchl thatv` theV toolsIY can be changedv and the drum inspected;l

(b) to operate at a pre-fill speed with both the by-pa'ss able on the open market. It isr driven by any suitable type-of prime mover such as a steam. turbine diagrammaticall'y illustrated at 12'. The steam. turbine receives its steam through' the steam inlet pipe 13 and the. ow of steam to the turbine rotor (also not shown) is controlled from the steam inlet toa rotor by suitable valves in a chest generally designated 1`4 in a manner which is well known in the steam turbine art.

Turbine-control` The governor valve in. chest 14' is controlled by' a pneumatic-hydraulic. turbine governor 15' which receives its loading air through anair vdelivery line 16 connected through a manually operated' regulator 17 to the main air any' suitable; source (not shown). The main air supply l1 ne;1f8 has? a=. needle valvev as. at! 19 to control the.v ow.- of air to the manual air regulator 17 and a reducing valve 19a which regulatesthepressu're air. In the present sysvalve and mainl delivery line valvesopen: toV allow for fully expelling the air from the drilll stemA and? cutting tools, filling the drill stem and cutting tool, and establishin g flow through the cutting tool with a minimum' of hy'- draulic shock;

(c)- to allow the turbineto be brought up to working speed and pressure at a desired rate of change, `and ('d') to provide safety mechanisms whichl allow the-turbine and pumptobe shut down quicklyand to prevent the delivery pressure exceeding a predeterminedmaximum value.

The present invention thus embodies a meansforcon'- trollingA the operation of a delivery system wherein pressureA air is utilized to directly control the speedoftoperation of the turbine driving the jet jump or pumps 'in the system and theva-lvecontrolling the deliveryv of pressure fluid to the drill stem and the hydraulic tools-v to provide the desired conditionsA of operation; and toJ indirectly coact with the-'pressureof the lluidl deliveredi by-tlieypump tem. shown it will be delivered to the regulator 17 at about 30 p; s. i'. g.

By manuallyV adjusting the regulator 17, the delivery of air through air delivery line 16 acts to. control governor 15` and thus the turbine speed'. This in turn varies the speed of the pump driven thereby' between the predetermined minimum and predetermined maximum conditions 'of pressure at which the water is' to be deliveredv through Vthemain delivery line' 4' to the drill stemv 31 andJ boring headJl 2;. as is hereinafter described.

tion require.

The turbinel governor' 1Sl is so' adjusted that the` regu'- lator enters into7 the operation foreontrolli'ngv the turbine only from itsv preiill speed; conditionK to full speed con'dition; Accordingly' an idling by-pass Vline 20` having a manually operated by-pass valve 21 is provided across the'valves` in thel steaml chest 14'. TheV by-pass valve" 21 is set to deliver sucient steam to run the turbine at idling speed. The regulator 17 then adjustablye controls, by suitable air signals to the governor 15' and' the relay 2z as hereinafter described, theturbine speed from idling through'js-refilll and en -up through an'v i'unite number 'of working speeds to full speed conditions whereby the desired conditions of pump discharge can be secured.

At any time that the pressure of the air signals delivered through line 16 drops below that .required.for pretll speed, a controller mechanism 22 of the positive relay type more fully described hereinafter which receives these air signals through line 23 will open to allow airv at source pressure to pass from line 18a through to controller 22 to a connecting line 24 connected between the controller and the governor to deactuate the governor whereby the steam valves in the steam chest14 are closed and theturbine will drop to the idling speed conditions set by the by-pass valve 21'.

The panel or control board 25 on which the regulator 17 is mounted wil be at a point'remote from the turbine and pump in that it will be located at the pointfwhere the operator can manipulate the regulator to accomplish the desired conditions of operation. yIn the event of an emergency, however, in order to shut down the system an emergency switch 26 of the push button or the like type is also provided on thepanel board 2S which is connected to a solenoid trip valve 27 in the inlet to the steam chest 14. The tripping of the valve 27 will act to cut off the ow of steam to the steam chest 14 thereby shutting down the system.

Main delivery line valve control Y. 4 passed to the diaphragm motor 45 to change the by-pass valve 11 to a closed position.

The pressure delivered by pump 5 at all times acts in pressure conduit 51, and common conduit 52. This pressure is transmitted through line 53 to the main preslsure controller 49. whenthegpressure due to an increase in turbine speed exceeds apredetermined minimum thniai pressure controller will open' to pas's the pres'- sure air from line 50 to line 48 which in turn delivers the air to-the-relay 47. Y f A A- The relay 47 is normally maintained so that this air can pass through to line 46 by action of pressure air s delivered from line 5,4 to act against the diaphragm head Associated with the operation of the turbine'lZ and v controlled through connecting line 30 which receives pressure'air from air delivery line 16 is a positivev acting relay 31. Relay 31 andcontroller mechanismv 22are illustrated as identical in the present preferredform of the invention. It will be understood, however, that any 'suitable Vcontroller mechanism which will perform the desired operation may be utilized for this purpose.

Accordingly, only relay 31 is fully shown in the draw- (also not shown) of the relay 47.

The pressure air ,delivered from line 54 is controlled by the auxiliary pressure controller 58 which receives air at source pressure through connecting line 59 and fluid at pump pressure through connecting line 60.

As long as the pressure delivered by the pump through lines 51, 52, and 60 does not reach a predetermined maximum pressure air will pass through the controller 58 to line 54 and thence to the relay to act therein as above stated. When the fluid delivered by the pump exceeds theipredetermined'maximum pressure the air is prevented from activating the diaphragm head and the relay will vent the diaphragm motor 45 to atmosphere, thereby opening the by-pass valve 11.

Operation v `I-n operation, steam is introduced through steam inlet 13 of the turbine and pressure air through main pressure airline 18.

ing, as including a valve 32 adapted to engage and mainl 19a adjusted manually to the desired pressure. Regulator tain port 33 normally closed and port 34 in the diaphragm head 35 normally open. l The port 34.communicates' with atmosphere through passage 36 and outlets 37 and 38 and will act in this open position to vent4 the diaphragm motor 9 to atmosphere through line 39 communicating with port 40 and valve chamber 41in the relay 31.

When the regulator is adjusted to bring the air signaling pressure in lines 16and 30 up to pretll signaling pressure, the diaphragm head 35 will be actuated'to close port 34 and move Mvalve 32 to open. port 33 thereby allowing air at source pressure to expand from line 18b through port 42, and valve chamber 41 and port 40 of the relay 31 and line 394 to the diaphragm motor 9 thereby actuating the delivery line. valve 8 to an open position.

By-pass valve control It is believed clear that the pressure of the". fluid delivered by the pump 5 will vary proportionately. with the speed of the turbine.

' This variation in discharge head of pump 5`pr'ovides'a simple means to control the operation of the by-pass valve 11, to correlate the opening and closing of the by-pass valve 11 with the speed of the turbine 12 and thefopen.- ing of the main ldeliveryV line valve 8 above 'derscv:' ri l )e i. Thus, Nthe figure shows valve 11., operatedbya dif aphragm motor 45 connected' throughline 46 to a relay 47 through which' pressure air is delivered from line 43 through a main pressure controller generally designated The steam is utilized to drive the turbine 12 and during starting up will be by-passed through the by-pass line 20 in an amount, sufficient to idle the turbine to allow it to heat up.

' The needle Vvalve 19 is opened and the pressure reducer 17 fwill now be4 used to vary the pressure delivered through line 16 to the governor 15 between 5 p. s. i. g. to` 25 p. s. i. g. as indicatedby gauge 70.

. When the regulator 17 is now manually turned to raise the pressure from 5 p. s. i. g. to 8 p. s. i. g., this pressure. will through lines 16 and 30 signal relay 31 to actuate valve 8 to an open position and through the action of relay 22 and turbine governor 15, all as above described, the turbine speed will increase to that required f or the pump to fill-gradually and without shock the drill s tem 3 and-hydraulic tool 2, connected to the main fluid delivery line 4, thus preparing the system for the iiuid at working pressure.V

The discharge head ofithe pump can now be increased tov that required to close by-pass valve 11 thru action of the main pressure controller 49 and then brought up to full operating pressure by further manipulating the regulator 17.- As longl as the pressure of fluid delivered by the pump -5 remains within the predetermined minimum and maximum pressure conditions at which the main pressure Ycontrollery49 and the auxiliary pressure controller 58 will come into operation, the by-pass valve will remain closed and high pressure uid will be delivered through the main delivery line 4to the cutting and bor 49 communicating .through line 50`to .the main pressure ln'thelother position of'therelay, actuating ai r4 w,i11;l? 75 ingrhead 2. Y, l l

The diaphragm motor operated valves 8 and 11; the relays 22, 131,` and"47; the controllers 49 and 58 and solenoid valve 27 are elements which are well known and easily p nrchasable o n the open market, hence they have not .been more-fully shown anddescribed, as their spe- .itic structuredoes not form part of this invention.

1A pressuregaugeI 71 and an alarm bell 72 are provided atthe control Apanel 25 which connect through l p 4 jg pressureltransmitter 73 communicating with the delivery the b Pass valve 11 willbcin itsnomally @Damnationllvs 4. t9 mais! numndisqhareepressure ASignals redress instruments. f

It will be understood that the invention is not to be limited to the specic construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. The combination with a high pressure fluid delivery system including a uid reservoir, a pump having its suction connected to said reservoir and a discharge, a main delivery line connected to said discharge of the pump to receive fluid therefrom, a normally closed pneumatically operated valve in said main delivery line to control the flow of fluid therethrough, a by-pass line connecting the discharge of said pump to said reservoir, a normally open pneumatically operated valve in said by-pass line, a prime mover for driving said pump, a fuel inlet to deliver fuel to said prime mover, and a pneumatically operated valve for controlling the ow of fuel to said prime mover to regulate the speed thereof, of a pneumatic system comprising a source of compressed gas, means connected to said source for regulating delivery of compressed gas at reduced pressure to directly actuate said fuel control valve to regulate the prime mover operation from idle to full speed, means operated oi of said regulating means to control delivery of pressure gas at a. predetermined pressure to said main delivery line valve to actuate said valve to an open position, and means operatively connected to the discharge of said pump to control delivery of pressure gas to said by-pass valve to actuate said valve to a closed position between predetermined minimum and maximum pump discharge pressures.

2. In the combination as claimed in claim 1 wherein means are provided to regulate the idling speed of said prime mover when said fuel inlet valve is not in operation, and a control mechanism connected between said regulator and said fuel inlet valve to render said regulator inoperative at a predetermined minimum pressure.

3. The combination with a high pressure uid delivery system including a iluid reservoir, a pump having its suction connected to said reservoir and a discharge, a main delivery line connected to said discharge of the pump to receive uid therefrom, a normally closed pneumatically operated valve in said main delivery line to control the ilow of fluid therethrough, a by-pass line connecting the discharge of said pump to said reservoir, a normally open pneumatically operated valve in said by-pass line, a prime mover for driving said pump, a fuel inlet to deliver fuel to said prime mover, and a pneumatically operated valve for controlling the flow of fuel to said prime mover to regulate the speed thereof, of a pneumatic system comprising a source of compressed gas, a regulator connected to said source and to said fuel control valve to regulate delivery of operating air directly to said valve whereby the speed of said prime mover can be adjusted from idle to full speed conditions, a relay connected between said regulator and said fuel control valve to control delivery of pressure air from said source to said main delivery line valve to actuate said valve to an open position at a predetermined pressure intermediate the idle and full speed pressure position of the regulator, means for controlling delivery of pressure air to said by-pass valve to move said valve to a closed position, said means operatively connected to the discharge of said pump and to actuate delivery of pressure gas at a predetermined minimum pump delivery pressure and to stop delivery of pressure gas at a predetermined maximum pump delivery pressure.

OConnor et al. Nov. 25, 1952 Yeomans May 5, 1953 

